That would be a nice high level ability for a Consular. Give it an long cooldown and let it cost no Force. Either it does damage or it stuns the opponent for a longer time than Force stun.
But it wasn't invented at this point.
(Btw. I'd like an RPG where Jedi are able to subdue even trash without killing them.)
It would be a good Consular power, but I think that Force Exhaustion power Focus Knights get is similar to Malacia.
I don't believe it was invented at this point. I believe it was created by Oppo Rancisis.